Omega Engineering LDP-124 User Manual page 16

8.4.- CONFIGURATION TABLES for BITS, PARITY AND SIGNAL INPUT
Jumpers position in
Selector S3
R S T
Jumper closed =
Signal Input
Type
RS-232 ±15 V
RS-485
RS-422
Internal Load
RS-485
RS-422
External Load
RS-423 ±5 V
Loop Powered
2 mA
Loop Powered
20 mA
TTL Level
8.5.- LEVEL LOGIC CONFIGURATION
Level logic for Signal Input configured as 2 mA, 20 mA, RS-423 or RS 232 can
be inverted placing the jumpers K and L as shown
Page : 15
BITS AND PARITY CONFIGURATION
Bits Parity
7 Odd
7 Even
7 Ignored
Jumper opened =
SIGNAL INPUT CONFIGURATION
Jumpers position in
Selector S1
A B C D E F G H I J
Jumpers position in
Selector S3
R S T
Signal Input Connector
Selector S2 Pin 1
K L M N O
Input
Signal B Signal A
Signal B Signal A
Input
Loop -
Loop +
Loop -
Loop +
+5 V
Bits Parity
8 Odd
8 Even
8 Ignored
8 None
Pin 2 Pin 3
+5 V GND
GND
GND
+5 V GND
Loop + not used A
not used Loop - B
Loop + not used A
not used Loop - B
Input GND
A = Loop internally powered
B = Loop externally powered
K L M N O